请教一道小五的数学题，实在的伤脑筋，请高手帮助，最好有解题过程，谢谢。
Alvin and Ken earned $6425 altogether .1/5 of Alvin’s monthly salary was $75 more than 1/6 of Ken’s monthly salary.How much money did Alvin earn each month?
感激涕零啊，谢谢。
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请教一道小五的数学题，实在的伤脑筋，请高手帮助，最好有解题过程，谢谢。
Alvin and Ken earned $6425 altogether .1/5 of Alvin’s monthly salary was $75 more than 1/6 of Ken’s monthly salary.How much money did Alvin earn each month?
感激涕零啊，谢谢。